本文通过莺歌海盆地东方１－１气田天然气地球化学特征的研究，探讨了天然气运移的地球化学指标。研究表明，低分子正构烷烃、异构烷烃与正构烷比值、芳烃与链状烷烃比值、△Ｒ３参数、同位素及非烃组分可作为较好的天然气运移地球化学指标。这些地球化学指标在垂向上的变化规律显示了东方１－１气田天然气垂向运移的特点 In this paper, we study the geochemical characteristics of natural gas in Dongfang 1-1 gas field in Yinggehai Basin, and discuss the geochemical indicators of gas migration. The results show that the ratio of low molecular weight n-alkanes, isoparaffins to n-paraffins, aromatics to paraffins, △ R3 parameters, isotopes and non-hydrocarbon components can be used as good indicators of migration of natural gas. The vertical variation of these geochemical indicators shows the vertical migration of natural gas in the East 1-1 gas field